What two factors does the force between two magnets depend upon?

If the masses are not electrically charged, then the force between them is proportional

to the product of their individual masses, and inversely proportional to the square of the

distance between their centers of mass.

If the masses are electrically charged, then the force between them is proportional to the

product of the magnitudes of their individual charges, and inversely proportional to the

square of the distance between the centers of their charges. The force is repulsive if the

signs of their charges are the same, and attractive if the signs of their charges are opposite.

There's also a component of gravitational force in there, which is always attractive, but the

respective proportionality constants differ by a factor of about 1040 , so the gravitational

component is usually relatively negligible.